{
  programs.nixvim = {
    opts.completeopt = [ "menu" "menuone" "noselect" ];

    plugins = {
      luasnip.enable = true;

      lspkind = {
        enable = true;

        cmp = {
          enable = true;
          menu = {
            nvim_lsp = "[LSP]";
            nvim_lua = "[api]";
            path = "[path]";
            luasnip = "[snip]";
            buffer = "[buffer]";
            nixpkgs_maintainers = "[nixpkgs]";
          };
        };
      };

      cmp = {
        enable = true;

        settings = {
          snippet.expand =
            "function(args) require('luasnip').lsp_expand(args.body) end";

          mapping = {
            "<C-d>" = "cmp.mapping.scroll_docs(-4)";
            "<C-f>" = "cmp.mapping.scroll_docs(4)";
            "<C-Space>" = "cmp.mapping.complete()";
            "<C-e>" = "cmp.mapping.close()";
            "<Tab>" = "cmp.mapping(cmp.mapping.select_next_item(), {'i', 's'})";
            "<S-Tab>" =
              "cmp.mapping(cmp.mapping.select_prev_item(), {'i', 's'})";
            "<CR>" = "cmp.mapping.confirm({ select = true })";
          };

          sources = [
            { name = "path"; }
            { name = "nvim_lsp"; }
            { name = "luasnip"; }
            { name = "nixpkgs_maintainers"; }
            {
              name = "buffer";
              # words from other open buffers can also be suggested
              option.get_bufnrs.__raw = "vim.api.nvim_list_bufs";
            }
          ];
        };
      };
    };
  };
}